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Diffstat (limited to 'drivers/net/pcmcia/axnet_cs.c')
-rw-r--r--drivers/net/pcmcia/axnet_cs.c1725
1 files changed, 1725 insertions, 0 deletions
diff --git a/drivers/net/pcmcia/axnet_cs.c b/drivers/net/pcmcia/axnet_cs.c
new file mode 100644
index 00000000000..9953db71196
--- /dev/null
+++ b/drivers/net/pcmcia/axnet_cs.c
@@ -0,0 +1,1725 @@
1/*======================================================================
2
3 A PCMCIA ethernet driver for Asix AX88190-based cards
4
5 The Asix AX88190 is a NS8390-derived chipset with a few nasty
6 idiosyncracies that make it very inconvenient to support with a
7 standard 8390 driver. This driver is based on pcnet_cs, with the
8 tweaked 8390 code grafted on the end. Much of what I did was to
9 clean up and update a similar driver supplied by Asix, which was
10 adapted by William Lee, william@asix.com.tw.
11
12 Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
13
14 axnet_cs.c 1.28 2002/06/29 06:27:37
15
16 The network driver code is based on Donald Becker's NE2000 code:
17
18 Written 1992,1993 by Donald Becker.
19 Copyright 1993 United States Government as represented by the
20 Director, National Security Agency. This software may be used and
21 distributed according to the terms of the GNU General Public License,
22 incorporated herein by reference.
23 Donald Becker may be reached at becker@scyld.com
24
25======================================================================*/
26
27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/ptrace.h>
33#include <linux/string.h>
34#include <linux/timer.h>
35#include <linux/delay.h>
36#include <linux/spinlock.h>
37#include <linux/netdevice.h>
38#include <linux/etherdevice.h>
39#include <linux/crc32.h>
40#include <linux/mii.h>
41#include "../8390.h"
42
43#include <pcmcia/cistpl.h>
44#include <pcmcia/ciscode.h>
45#include <pcmcia/ds.h>
46#include <pcmcia/cisreg.h>
47
48#include <asm/io.h>
49#include <asm/system.h>
50#include <asm/byteorder.h>
51#include <asm/uaccess.h>
52
53#define AXNET_CMD 0x00
54#define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
55#define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
56#define AXNET_MII_EEP 0x14 /* Offset of MII access port */
57#define AXNET_TEST 0x15 /* Offset of TEST Register port */
58#define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
59
60#define AXNET_START_PG 0x40 /* First page of TX buffer */
61#define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
62
63#define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
64
65#define IS_AX88190 0x0001
66#define IS_AX88790 0x0002
67
68/*====================================================================*/
69
70/* Module parameters */
71
72MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
73MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
74MODULE_LICENSE("GPL");
75
76
77/*====================================================================*/
78
79static int axnet_config(struct pcmcia_device *link);
80static void axnet_release(struct pcmcia_device *link);
81static int axnet_open(struct net_device *dev);
82static int axnet_close(struct net_device *dev);
83static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
84static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
85 struct net_device *dev);
86static struct net_device_stats *get_stats(struct net_device *dev);
87static void set_multicast_list(struct net_device *dev);
88static void axnet_tx_timeout(struct net_device *dev);
89static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
90static void ei_watchdog(u_long arg);
91static void axnet_reset_8390(struct net_device *dev);
92
93static int mdio_read(unsigned int addr, int phy_id, int loc);
94static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
95
96static void get_8390_hdr(struct net_device *,
97 struct e8390_pkt_hdr *, int);
98static void block_input(struct net_device *dev, int count,
99 struct sk_buff *skb, int ring_offset);
100static void block_output(struct net_device *dev, int count,
101 const u_char *buf, const int start_page);
102
103static void axnet_detach(struct pcmcia_device *p_dev);
104
105static void AX88190_init(struct net_device *dev, int startp);
106static int ax_open(struct net_device *dev);
107static int ax_close(struct net_device *dev);
108static irqreturn_t ax_interrupt(int irq, void *dev_id);
109
110/*====================================================================*/
111
112typedef struct axnet_dev_t {
113 struct pcmcia_device *p_dev;
114 caddr_t base;
115 struct timer_list watchdog;
116 int stale, fast_poll;
117 u_short link_status;
118 u_char duplex_flag;
119 int phy_id;
120 int flags;
121 int active_low;
122} axnet_dev_t;
123
124static inline axnet_dev_t *PRIV(struct net_device *dev)
125{
126 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
127 return p;
128}
129
130static const struct net_device_ops axnet_netdev_ops = {
131 .ndo_open = axnet_open,
132 .ndo_stop = axnet_close,
133 .ndo_do_ioctl = axnet_ioctl,
134 .ndo_start_xmit = axnet_start_xmit,
135 .ndo_tx_timeout = axnet_tx_timeout,
136 .ndo_get_stats = get_stats,
137 .ndo_set_multicast_list = set_multicast_list,
138 .ndo_change_mtu = eth_change_mtu,
139 .ndo_set_mac_address = eth_mac_addr,
140 .ndo_validate_addr = eth_validate_addr,
141};
142
143static int axnet_probe(struct pcmcia_device *link)
144{
145 axnet_dev_t *info;
146 struct net_device *dev;
147 struct ei_device *ei_local;
148
149 dev_dbg(&link->dev, "axnet_attach()\n");
150
151 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
152 if (!dev)
153 return -ENOMEM;
154
155 ei_local = netdev_priv(dev);
156 spin_lock_init(&ei_local->page_lock);
157
158 info = PRIV(dev);
159 info->p_dev = link;
160 link->priv = dev;
161 link->config_flags |= CONF_ENABLE_IRQ;
162
163 dev->netdev_ops = &axnet_netdev_ops;
164
165 dev->watchdog_timeo = TX_TIMEOUT;
166
167 return axnet_config(link);
168} /* axnet_attach */
169
170static void axnet_detach(struct pcmcia_device *link)
171{
172 struct net_device *dev = link->priv;
173
174 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
175
176 unregister_netdev(dev);
177
178 axnet_release(link);
179
180 free_netdev(dev);
181} /* axnet_detach */
182
183/*======================================================================
184
185 This probes for a card's hardware address by reading the PROM.
186
187======================================================================*/
188
189static int get_prom(struct pcmcia_device *link)
190{
191 struct net_device *dev = link->priv;
192 unsigned int ioaddr = dev->base_addr;
193 int i, j;
194
195 /* This is based on drivers/net/ne.c */
196 struct {
197 u_char value, offset;
198 } program_seq[] = {
199 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
200 {0x01, EN0_DCFG}, /* Set word-wide access. */
201 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
202 {0x00, EN0_RCNTHI},
203 {0x00, EN0_IMR}, /* Mask completion irq. */
204 {0xFF, EN0_ISR},
205 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
206 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
207 {0x10, EN0_RCNTLO},
208 {0x00, EN0_RCNTHI},
209 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
210 {0x04, EN0_RSARHI},
211 {E8390_RREAD+E8390_START, E8390_CMD},
212 };
213
214 /* Not much of a test, but the alternatives are messy */
215 if (link->config_base != 0x03c0)
216 return 0;
217
218 axnet_reset_8390(dev);
219 mdelay(10);
220
221 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
222 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
223
224 for (i = 0; i < 6; i += 2) {
225 j = inw(ioaddr + AXNET_DATAPORT);
226 dev->dev_addr[i] = j & 0xff;
227 dev->dev_addr[i+1] = j >> 8;
228 }
229 return 1;
230} /* get_prom */
231
232static int try_io_port(struct pcmcia_device *link)
233{
234 int j, ret;
235 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
236 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
237 if (link->resource[0]->end == 32) {
238 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
239 /* for master/slave multifunction cards */
240 if (link->resource[1]->end > 0)
241 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
242 } else {
243 /* This should be two 16-port windows */
244 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
245 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
246 }
247 if (link->resource[0]->start == 0) {
248 for (j = 0; j < 0x400; j += 0x20) {
249 link->resource[0]->start = j ^ 0x300;
250 link->resource[1]->start = (j ^ 0x300) + 0x10;
251 link->io_lines = 16;
252 ret = pcmcia_request_io(link);
253 if (ret == 0)
254 return ret;
255 }
256 return ret;
257 } else {
258 return pcmcia_request_io(link);
259 }
260}
261
262static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
263{
264 if (p_dev->config_index == 0)
265 return -EINVAL;
266
267 p_dev->config_index = 0x05;
268 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
269 return -ENODEV;
270
271 return try_io_port(p_dev);
272}
273
274static int axnet_config(struct pcmcia_device *link)
275{
276 struct net_device *dev = link->priv;
277 axnet_dev_t *info = PRIV(dev);
278 int i, j, j2, ret;
279
280 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
281
282 /* don't trust the CIS on this; Linksys got it wrong */
283 link->config_regs = 0x63;
284 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
285 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
286 if (ret != 0)
287 goto failed;
288
289 if (!link->irq)
290 goto failed;
291
292 if (resource_size(link->resource[1]) == 8)
293 link->config_flags |= CONF_ENABLE_SPKR;
294
295 ret = pcmcia_enable_device(link);
296 if (ret)
297 goto failed;
298
299 dev->irq = link->irq;
300 dev->base_addr = link->resource[0]->start;
301
302 if (!get_prom(link)) {
303 pr_notice("this is not an AX88190 card!\n");
304 pr_notice("use pcnet_cs instead.\n");
305 goto failed;
306 }
307
308 ei_status.name = "AX88190";
309 ei_status.word16 = 1;
310 ei_status.tx_start_page = AXNET_START_PG;
311 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
312 ei_status.stop_page = AXNET_STOP_PG;
313 ei_status.reset_8390 = axnet_reset_8390;
314 ei_status.get_8390_hdr = get_8390_hdr;
315 ei_status.block_input = block_input;
316 ei_status.block_output = block_output;
317
318 if (inb(dev->base_addr + AXNET_TEST) != 0)
319 info->flags |= IS_AX88790;
320 else
321 info->flags |= IS_AX88190;
322
323 if (info->flags & IS_AX88790)
324 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
325
326 info->active_low = 0;
327
328 for (i = 0; i < 32; i++) {
329 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
330 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
331 if (j == j2) continue;
332 if ((j != 0) && (j != 0xffff)) break;
333 }
334
335 if (i == 32) {
336 /* Maybe PHY is in power down mode. (PPD_SET = 1)
337 Bit 2 of CCSR is active low. */
338 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
339 for (i = 0; i < 32; i++) {
340 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
341 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
342 if (j == j2) continue;
343 if ((j != 0) && (j != 0xffff)) {
344 info->active_low = 1;
345 break;
346 }
347 }
348 }
349
350 info->phy_id = (i < 32) ? i : -1;
351 SET_NETDEV_DEV(dev, &link->dev);
352
353 if (register_netdev(dev) != 0) {
354 pr_notice("register_netdev() failed\n");
355 goto failed;
356 }
357
358 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
359 ((info->flags & IS_AX88790) ? 7 : 1),
360 dev->base_addr, dev->irq, dev->dev_addr);
361 if (info->phy_id != -1) {
362 netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
363 info->phy_id, j);
364 } else {
365 netdev_notice(dev, " No MII transceivers found!\n");
366 }
367 return 0;
368
369failed:
370 axnet_release(link);
371 return -ENODEV;
372} /* axnet_config */
373
374static void axnet_release(struct pcmcia_device *link)
375{
376 pcmcia_disable_device(link);
377}
378
379static int axnet_suspend(struct pcmcia_device *link)
380{
381 struct net_device *dev = link->priv;
382
383 if (link->open)
384 netif_device_detach(dev);
385
386 return 0;
387}
388
389static int axnet_resume(struct pcmcia_device *link)
390{
391 struct net_device *dev = link->priv;
392 axnet_dev_t *info = PRIV(dev);
393
394 if (link->open) {
395 if (info->active_low == 1)
396 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
397
398 axnet_reset_8390(dev);
399 AX88190_init(dev, 1);
400 netif_device_attach(dev);
401 }
402
403 return 0;
404}
405
406
407/*======================================================================
408
409 MII interface support
410
411======================================================================*/
412
413#define MDIO_SHIFT_CLK 0x01
414#define MDIO_DATA_WRITE0 0x00
415#define MDIO_DATA_WRITE1 0x08
416#define MDIO_DATA_READ 0x04
417#define MDIO_MASK 0x0f
418#define MDIO_ENB_IN 0x02
419
420static void mdio_sync(unsigned int addr)
421{
422 int bits;
423 for (bits = 0; bits < 32; bits++) {
424 outb_p(MDIO_DATA_WRITE1, addr);
425 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
426 }
427}
428
429static int mdio_read(unsigned int addr, int phy_id, int loc)
430{
431 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
432 int i, retval = 0;
433
434 mdio_sync(addr);
435 for (i = 14; i >= 0; i--) {
436 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
437 outb_p(dat, addr);
438 outb_p(dat | MDIO_SHIFT_CLK, addr);
439 }
440 for (i = 19; i > 0; i--) {
441 outb_p(MDIO_ENB_IN, addr);
442 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
443 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
444 }
445 return (retval>>1) & 0xffff;
446}
447
448static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
449{
450 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
451 int i;
452
453 mdio_sync(addr);
454 for (i = 31; i >= 0; i--) {
455 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
456 outb_p(dat, addr);
457 outb_p(dat | MDIO_SHIFT_CLK, addr);
458 }
459 for (i = 1; i >= 0; i--) {
460 outb_p(MDIO_ENB_IN, addr);
461 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
462 }
463}
464
465/*====================================================================*/
466
467static int axnet_open(struct net_device *dev)
468{
469 int ret;
470 axnet_dev_t *info = PRIV(dev);
471 struct pcmcia_device *link = info->p_dev;
472 unsigned int nic_base = dev->base_addr;
473
474 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
475
476 if (!pcmcia_dev_present(link))
477 return -ENODEV;
478
479 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
480 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
481 if (ret)
482 return ret;
483
484 link->open++;
485
486 info->link_status = 0x00;
487 init_timer(&info->watchdog);
488 info->watchdog.function = ei_watchdog;
489 info->watchdog.data = (u_long)dev;
490 info->watchdog.expires = jiffies + HZ;
491 add_timer(&info->watchdog);
492
493 return ax_open(dev);
494} /* axnet_open */
495
496/*====================================================================*/
497
498static int axnet_close(struct net_device *dev)
499{
500 axnet_dev_t *info = PRIV(dev);
501 struct pcmcia_device *link = info->p_dev;
502
503 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
504
505 ax_close(dev);
506 free_irq(dev->irq, dev);
507
508 link->open--;
509 netif_stop_queue(dev);
510 del_timer_sync(&info->watchdog);
511
512 return 0;
513} /* axnet_close */
514
515/*======================================================================
516
517 Hard reset the card. This used to pause for the same period that
518 a 8390 reset command required, but that shouldn't be necessary.
519
520======================================================================*/
521
522static void axnet_reset_8390(struct net_device *dev)
523{
524 unsigned int nic_base = dev->base_addr;
525 int i;
526
527 ei_status.txing = ei_status.dmaing = 0;
528
529 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
530
531 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
532
533 for (i = 0; i < 100; i++) {
534 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
535 break;
536 udelay(100);
537 }
538 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
539
540 if (i == 100)
541 netdev_err(dev, "axnet_reset_8390() did not complete\n");
542
543} /* axnet_reset_8390 */
544
545/*====================================================================*/
546
547static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
548{
549 struct net_device *dev = dev_id;
550 PRIV(dev)->stale = 0;
551 return ax_interrupt(irq, dev_id);
552}
553
554static void ei_watchdog(u_long arg)
555{
556 struct net_device *dev = (struct net_device *)(arg);
557 axnet_dev_t *info = PRIV(dev);
558 unsigned int nic_base = dev->base_addr;
559 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
560 u_short link;
561
562 if (!netif_device_present(dev)) goto reschedule;
563
564 /* Check for pending interrupt with expired latency timer: with
565 this, we can limp along even if the interrupt is blocked */
566 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
567 if (!info->fast_poll)
568 netdev_info(dev, "interrupt(s) dropped!\n");
569 ei_irq_wrapper(dev->irq, dev);
570 info->fast_poll = HZ;
571 }
572 if (info->fast_poll) {
573 info->fast_poll--;
574 info->watchdog.expires = jiffies + 1;
575 add_timer(&info->watchdog);
576 return;
577 }
578
579 if (info->phy_id < 0)
580 goto reschedule;
581 link = mdio_read(mii_addr, info->phy_id, 1);
582 if (!link || (link == 0xffff)) {
583 netdev_info(dev, "MII is missing!\n");
584 info->phy_id = -1;
585 goto reschedule;
586 }
587
588 link &= 0x0004;
589 if (link != info->link_status) {
590 u_short p = mdio_read(mii_addr, info->phy_id, 5);
591 netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
592 if (link) {
593 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
594 if (p)
595 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
596 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
597 else
598 netdev_info(dev, "link partner did not autonegotiate\n");
599 AX88190_init(dev, 1);
600 }
601 info->link_status = link;
602 }
603
604reschedule:
605 info->watchdog.expires = jiffies + HZ;
606 add_timer(&info->watchdog);
607}
608
609/*====================================================================*/
610
611static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
612{
613 axnet_dev_t *info = PRIV(dev);
614 struct mii_ioctl_data *data = if_mii(rq);
615 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
616 switch (cmd) {
617 case SIOCGMIIPHY:
618 data->phy_id = info->phy_id;
619 case SIOCGMIIREG: /* Read MII PHY register. */
620 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
621 return 0;
622 case SIOCSMIIREG: /* Write MII PHY register. */
623 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
624 return 0;
625 }
626 return -EOPNOTSUPP;
627}
628
629/*====================================================================*/
630
631static void get_8390_hdr(struct net_device *dev,
632 struct e8390_pkt_hdr *hdr,
633 int ring_page)
634{
635 unsigned int nic_base = dev->base_addr;
636
637 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
638 outb_p(ring_page, nic_base + EN0_RSARHI);
639 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
640
641 insw(nic_base + AXNET_DATAPORT, hdr,
642 sizeof(struct e8390_pkt_hdr)>>1);
643 /* Fix for big endian systems */
644 hdr->count = le16_to_cpu(hdr->count);
645
646}
647
648/*====================================================================*/
649
650static void block_input(struct net_device *dev, int count,
651 struct sk_buff *skb, int ring_offset)
652{
653 unsigned int nic_base = dev->base_addr;
654 int xfer_count = count;
655 char *buf = skb->data;
656
657 if ((ei_debug > 4) && (count != 4))
658 pr_debug("%s: [bi=%d]\n", dev->name, count+4);
659 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
660 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
661 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
662
663 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
664 if (count & 0x01)
665 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
666
667}
668
669/*====================================================================*/
670
671static void block_output(struct net_device *dev, int count,
672 const u_char *buf, const int start_page)
673{
674 unsigned int nic_base = dev->base_addr;
675
676 pr_debug("%s: [bo=%d]\n", dev->name, count);
677
678 /* Round the count up for word writes. Do we need to do this?
679 What effect will an odd byte count have on the 8390?
680 I should check someday. */
681 if (count & 0x01)
682 count++;
683
684 outb_p(0x00, nic_base + EN0_RSARLO);
685 outb_p(start_page, nic_base + EN0_RSARHI);
686 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
687 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
688}
689
690static const struct pcmcia_device_id axnet_ids[] = {
691 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
692 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
693 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
694 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
695 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
696 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
697 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
698 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
699 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
700 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
701 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
702 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
703 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
704 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
705 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
706 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
707 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
708 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
709 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
710 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
711 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
712 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
713 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
714 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
715 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
716 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
717 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
718 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
719 PCMCIA_DEVICE_NULL,
720};
721MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
722
723static struct pcmcia_driver axnet_cs_driver = {
724 .owner = THIS_MODULE,
725 .name = "axnet_cs",
726 .probe = axnet_probe,
727 .remove = axnet_detach,
728 .id_table = axnet_ids,
729 .suspend = axnet_suspend,
730 .resume = axnet_resume,
731};
732
733static int __init init_axnet_cs(void)
734{
735 return pcmcia_register_driver(&axnet_cs_driver);
736}
737
738static void __exit exit_axnet_cs(void)
739{
740 pcmcia_unregister_driver(&axnet_cs_driver);
741}
742
743module_init(init_axnet_cs);
744module_exit(exit_axnet_cs);
745
746/*====================================================================*/
747
748/* 8390.c: A general NS8390 ethernet driver core for linux. */
749/*
750 Written 1992-94 by Donald Becker.
751
752 Copyright 1993 United States Government as represented by the
753 Director, National Security Agency.
754
755 This software may be used and distributed according to the terms
756 of the GNU General Public License, incorporated herein by reference.
757
758 The author may be reached as becker@scyld.com, or C/O
759 Scyld Computing Corporation
760 410 Severn Ave., Suite 210
761 Annapolis MD 21403
762
763 This is the chip-specific code for many 8390-based ethernet adaptors.
764 This is not a complete driver, it must be combined with board-specific
765 code such as ne.c, wd.c, 3c503.c, etc.
766
767 Seeing how at least eight drivers use this code, (not counting the
768 PCMCIA ones either) it is easy to break some card by what seems like
769 a simple innocent change. Please contact me or Donald if you think
770 you have found something that needs changing. -- PG
771
772 Changelog:
773
774 Paul Gortmaker : remove set_bit lock, other cleanups.
775 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
776 ei_block_input() for eth_io_copy_and_sum().
777 Paul Gortmaker : exchange static int ei_pingpong for a #define,
778 also add better Tx error handling.
779 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
780 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
781 Paul Gortmaker : tweak ANK's above multicast changes a bit.
782 Paul Gortmaker : update packet statistics for v2.1.x
783 Alan Cox : support arbitrary stupid port mappings on the
784 68K Macintosh. Support >16bit I/O spaces
785 Paul Gortmaker : add kmod support for auto-loading of the 8390
786 module by all drivers that require it.
787 Alan Cox : Spinlocking work, added 'BUG_83C690'
788 Paul Gortmaker : Separate out Tx timeout code from Tx path.
789
790 Sources:
791 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
792
793 */
794
795#include <linux/bitops.h>
796#include <asm/irq.h>
797#include <linux/fcntl.h>
798#include <linux/in.h>
799#include <linux/interrupt.h>
800
801#define BUG_83C690
802
803/* These are the operational function interfaces to board-specific
804 routines.
805 void reset_8390(struct net_device *dev)
806 Resets the board associated with DEV, including a hardware reset of
807 the 8390. This is only called when there is a transmit timeout, and
808 it is always followed by 8390_init().
809 void block_output(struct net_device *dev, int count, const unsigned char *buf,
810 int start_page)
811 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
812 "page" value uses the 8390's 256-byte pages.
813 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
814 Read the 4 byte, page aligned 8390 header. *If* there is a
815 subsequent read, it will be of the rest of the packet.
816 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
817 Read COUNT bytes from the packet buffer into the skb data area. Start
818 reading from RING_OFFSET, the address as the 8390 sees it. This will always
819 follow the read of the 8390 header.
820*/
821#define ei_reset_8390 (ei_local->reset_8390)
822#define ei_block_output (ei_local->block_output)
823#define ei_block_input (ei_local->block_input)
824#define ei_get_8390_hdr (ei_local->get_8390_hdr)
825
826/* use 0 for production, 1 for verification, >2 for debug */
827#ifndef ei_debug
828int ei_debug = 1;
829#endif
830
831/* Index to functions. */
832static void ei_tx_intr(struct net_device *dev);
833static void ei_tx_err(struct net_device *dev);
834static void ei_receive(struct net_device *dev);
835static void ei_rx_overrun(struct net_device *dev);
836
837/* Routines generic to NS8390-based boards. */
838static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
839 int start_page);
840static void do_set_multicast_list(struct net_device *dev);
841
842/*
843 * SMP and the 8390 setup.
844 *
845 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
846 * a page register that controls bank and packet buffer access. We guard
847 * this with ei_local->page_lock. Nobody should assume or set the page other
848 * than zero when the lock is not held. Lock holders must restore page 0
849 * before unlocking. Even pure readers must take the lock to protect in
850 * page 0.
851 *
852 * To make life difficult the chip can also be very slow. We therefore can't
853 * just use spinlocks. For the longer lockups we disable the irq the device
854 * sits on and hold the lock. We must hold the lock because there is a dual
855 * processor case other than interrupts (get stats/set multicast list in
856 * parallel with each other and transmit).
857 *
858 * Note: in theory we can just disable the irq on the card _but_ there is
859 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
860 * enter lock, take the queued irq. So we waddle instead of flying.
861 *
862 * Finally by special arrangement for the purpose of being generally
863 * annoying the transmit function is called bh atomic. That places
864 * restrictions on the user context callers as disable_irq won't save
865 * them.
866 */
867
868/**
869 * ax_open - Open/initialize the board.
870 * @dev: network device to initialize
871 *
872 * This routine goes all-out, setting everything
873 * up anew at each open, even though many of these registers should only
874 * need to be set once at boot.
875 */
876static int ax_open(struct net_device *dev)
877{
878 unsigned long flags;
879 struct ei_device *ei_local = netdev_priv(dev);
880
881 /*
882 * Grab the page lock so we own the register set, then call
883 * the init function.
884 */
885
886 spin_lock_irqsave(&ei_local->page_lock, flags);
887 AX88190_init(dev, 1);
888 /* Set the flag before we drop the lock, That way the IRQ arrives
889 after its set and we get no silly warnings */
890 netif_start_queue(dev);
891 spin_unlock_irqrestore(&ei_local->page_lock, flags);
892 ei_local->irqlock = 0;
893 return 0;
894}
895
896#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
897
898/**
899 * ax_close - shut down network device
900 * @dev: network device to close
901 *
902 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
903 */
904static int ax_close(struct net_device *dev)
905{
906 unsigned long flags;
907
908 /*
909 * Hold the page lock during close
910 */
911
912 spin_lock_irqsave(&dev_lock(dev), flags);
913 AX88190_init(dev, 0);
914 spin_unlock_irqrestore(&dev_lock(dev), flags);
915 netif_stop_queue(dev);
916 return 0;
917}
918
919/**
920 * axnet_tx_timeout - handle transmit time out condition
921 * @dev: network device which has apparently fallen asleep
922 *
923 * Called by kernel when device never acknowledges a transmit has
924 * completed (or failed) - i.e. never posted a Tx related interrupt.
925 */
926
927static void axnet_tx_timeout(struct net_device *dev)
928{
929 long e8390_base = dev->base_addr;
930 struct ei_device *ei_local = netdev_priv(dev);
931 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
932 unsigned long flags;
933
934 dev->stats.tx_errors++;
935
936 spin_lock_irqsave(&ei_local->page_lock, flags);
937 txsr = inb(e8390_base+EN0_TSR);
938 isr = inb(e8390_base+EN0_ISR);
939 spin_unlock_irqrestore(&ei_local->page_lock, flags);
940
941 netdev_printk(KERN_DEBUG, dev,
942 "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
943 (txsr & ENTSR_ABT) ? "excess collisions." :
944 (isr) ? "lost interrupt?" : "cable problem?",
945 txsr, isr, tickssofar);
946
947 if (!isr && !dev->stats.tx_packets)
948 {
949 /* The 8390 probably hasn't gotten on the cable yet. */
950 ei_local->interface_num ^= 1; /* Try a different xcvr. */
951 }
952
953 /* Ugly but a reset can be slow, yet must be protected */
954
955 spin_lock_irqsave(&ei_local->page_lock, flags);
956
957 /* Try to restart the card. Perhaps the user has fixed something. */
958 ei_reset_8390(dev);
959 AX88190_init(dev, 1);
960
961 spin_unlock_irqrestore(&ei_local->page_lock, flags);
962 netif_wake_queue(dev);
963}
964
965/**
966 * axnet_start_xmit - begin packet transmission
967 * @skb: packet to be sent
968 * @dev: network device to which packet is sent
969 *
970 * Sends a packet to an 8390 network device.
971 */
972
973static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
974 struct net_device *dev)
975{
976 long e8390_base = dev->base_addr;
977 struct ei_device *ei_local = netdev_priv(dev);
978 int length, send_length, output_page;
979 unsigned long flags;
980 u8 packet[ETH_ZLEN];
981
982 netif_stop_queue(dev);
983
984 length = skb->len;
985
986 /* Mask interrupts from the ethercard.
987 SMP: We have to grab the lock here otherwise the IRQ handler
988 on another CPU can flip window and race the IRQ mask set. We end
989 up trashing the mcast filter not disabling irqs if we don't lock */
990
991 spin_lock_irqsave(&ei_local->page_lock, flags);
992 outb_p(0x00, e8390_base + EN0_IMR);
993
994 /*
995 * Slow phase with lock held.
996 */
997
998 ei_local->irqlock = 1;
999
1000 send_length = max(length, ETH_ZLEN);
1001
1002 /*
1003 * We have two Tx slots available for use. Find the first free
1004 * slot, and then perform some sanity checks. With two Tx bufs,
1005 * you get very close to transmitting back-to-back packets. With
1006 * only one Tx buf, the transmitter sits idle while you reload the
1007 * card, leaving a substantial gap between each transmitted packet.
1008 */
1009
1010 if (ei_local->tx1 == 0)
1011 {
1012 output_page = ei_local->tx_start_page;
1013 ei_local->tx1 = send_length;
1014 if (ei_debug && ei_local->tx2 > 0)
1015 netdev_printk(KERN_DEBUG, dev,
1016 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
1017 ei_local->tx2, ei_local->lasttx,
1018 ei_local->txing);
1019 }
1020 else if (ei_local->tx2 == 0)
1021 {
1022 output_page = ei_local->tx_start_page + TX_PAGES/2;
1023 ei_local->tx2 = send_length;
1024 if (ei_debug && ei_local->tx1 > 0)
1025 netdev_printk(KERN_DEBUG, dev,
1026 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1027 ei_local->tx1, ei_local->lasttx,
1028 ei_local->txing);
1029 }
1030 else
1031 { /* We should never get here. */
1032 if (ei_debug)
1033 netdev_printk(KERN_DEBUG, dev,
1034 "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1035 ei_local->tx1, ei_local->tx2,
1036 ei_local->lasttx);
1037 ei_local->irqlock = 0;
1038 netif_stop_queue(dev);
1039 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1040 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1041 dev->stats.tx_errors++;
1042 return NETDEV_TX_BUSY;
1043 }
1044
1045 /*
1046 * Okay, now upload the packet and trigger a send if the transmitter
1047 * isn't already sending. If it is busy, the interrupt handler will
1048 * trigger the send later, upon receiving a Tx done interrupt.
1049 */
1050
1051 if (length == skb->len)
1052 ei_block_output(dev, length, skb->data, output_page);
1053 else {
1054 memset(packet, 0, ETH_ZLEN);
1055 skb_copy_from_linear_data(skb, packet, skb->len);
1056 ei_block_output(dev, length, packet, output_page);
1057 }
1058
1059 if (! ei_local->txing)
1060 {
1061 ei_local->txing = 1;
1062 NS8390_trigger_send(dev, send_length, output_page);
1063 dev->trans_start = jiffies;
1064 if (output_page == ei_local->tx_start_page)
1065 {
1066 ei_local->tx1 = -1;
1067 ei_local->lasttx = -1;
1068 }
1069 else
1070 {
1071 ei_local->tx2 = -1;
1072 ei_local->lasttx = -2;
1073 }
1074 }
1075 else ei_local->txqueue++;
1076
1077 if (ei_local->tx1 && ei_local->tx2)
1078 netif_stop_queue(dev);
1079 else
1080 netif_start_queue(dev);
1081
1082 /* Turn 8390 interrupts back on. */
1083 ei_local->irqlock = 0;
1084 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1085
1086 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1087
1088 dev_kfree_skb (skb);
1089 dev->stats.tx_bytes += send_length;
1090
1091 return NETDEV_TX_OK;
1092}
1093
1094/**
1095 * ax_interrupt - handle the interrupts from an 8390
1096 * @irq: interrupt number
1097 * @dev_id: a pointer to the net_device
1098 *
1099 * Handle the ether interface interrupts. We pull packets from
1100 * the 8390 via the card specific functions and fire them at the networking
1101 * stack. We also handle transmit completions and wake the transmit path if
1102 * necessary. We also update the counters and do other housekeeping as
1103 * needed.
1104 */
1105
1106static irqreturn_t ax_interrupt(int irq, void *dev_id)
1107{
1108 struct net_device *dev = dev_id;
1109 long e8390_base;
1110 int interrupts, nr_serviced = 0, i;
1111 struct ei_device *ei_local;
1112 int handled = 0;
1113 unsigned long flags;
1114
1115 e8390_base = dev->base_addr;
1116 ei_local = netdev_priv(dev);
1117
1118 /*
1119 * Protect the irq test too.
1120 */
1121
1122 spin_lock_irqsave(&ei_local->page_lock, flags);
1123
1124 if (ei_local->irqlock) {
1125#if 1 /* This might just be an interrupt for a PCI device sharing this line */
1126 const char *msg;
1127 /* The "irqlock" check is only for testing. */
1128 if (ei_local->irqlock)
1129 msg = "Interrupted while interrupts are masked!";
1130 else
1131 msg = "Reentering the interrupt handler!";
1132 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1133 msg,
1134 inb_p(e8390_base + EN0_ISR),
1135 inb_p(e8390_base + EN0_IMR));
1136#endif
1137 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1138 return IRQ_NONE;
1139 }
1140
1141 if (ei_debug > 3)
1142 netdev_printk(KERN_DEBUG, dev, "interrupt(isr=%#2.2x)\n",
1143 inb_p(e8390_base + EN0_ISR));
1144
1145 outb_p(0x00, e8390_base + EN0_ISR);
1146 ei_local->irqlock = 1;
1147
1148 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1149 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1150 ++nr_serviced < MAX_SERVICE)
1151 {
1152 if (!netif_running(dev) || (interrupts == 0xff)) {
1153 if (ei_debug > 1)
1154 netdev_warn(dev,
1155 "interrupt from stopped card\n");
1156 outb_p(interrupts, e8390_base + EN0_ISR);
1157 interrupts = 0;
1158 break;
1159 }
1160 handled = 1;
1161
1162 /* AX88190 bug fix. */
1163 outb_p(interrupts, e8390_base + EN0_ISR);
1164 for (i = 0; i < 10; i++) {
1165 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1166 break;
1167 outb_p(0, e8390_base + EN0_ISR);
1168 outb_p(interrupts, e8390_base + EN0_ISR);
1169 }
1170 if (interrupts & ENISR_OVER)
1171 ei_rx_overrun(dev);
1172 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1173 {
1174 /* Got a good (?) packet. */
1175 ei_receive(dev);
1176 }
1177 /* Push the next to-transmit packet through. */
1178 if (interrupts & ENISR_TX)
1179 ei_tx_intr(dev);
1180 else if (interrupts & ENISR_TX_ERR)
1181 ei_tx_err(dev);
1182
1183 if (interrupts & ENISR_COUNTERS)
1184 {
1185 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1186 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1187 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1188 }
1189 }
1190
1191 if (interrupts && ei_debug > 3)
1192 {
1193 handled = 1;
1194 if (nr_serviced >= MAX_SERVICE)
1195 {
1196 /* 0xFF is valid for a card removal */
1197 if(interrupts!=0xFF)
1198 netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n",
1199 interrupts);
1200 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1201 } else {
1202 netdev_warn(dev, "unknown interrupt %#2x\n",
1203 interrupts);
1204 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1205 }
1206 }
1207
1208 /* Turn 8390 interrupts back on. */
1209 ei_local->irqlock = 0;
1210 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1211
1212 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1213 return IRQ_RETVAL(handled);
1214}
1215
1216/**
1217 * ei_tx_err - handle transmitter error
1218 * @dev: network device which threw the exception
1219 *
1220 * A transmitter error has happened. Most likely excess collisions (which
1221 * is a fairly normal condition). If the error is one where the Tx will
1222 * have been aborted, we try and send another one right away, instead of
1223 * letting the failed packet sit and collect dust in the Tx buffer. This
1224 * is a much better solution as it avoids kernel based Tx timeouts, and
1225 * an unnecessary card reset.
1226 *
1227 * Called with lock held.
1228 */
1229
1230static void ei_tx_err(struct net_device *dev)
1231{
1232 long e8390_base = dev->base_addr;
1233 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1234 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1235
1236#ifdef VERBOSE_ERROR_DUMP
1237 netdev_printk(KERN_DEBUG, dev,
1238 "transmitter error (%#2x):", txsr);
1239 if (txsr & ENTSR_ABT)
1240 pr_cont(" excess-collisions");
1241 if (txsr & ENTSR_ND)
1242 pr_cont(" non-deferral");
1243 if (txsr & ENTSR_CRS)
1244 pr_cont(" lost-carrier");
1245 if (txsr & ENTSR_FU)
1246 pr_cont(" FIFO-underrun");
1247 if (txsr & ENTSR_CDH)
1248 pr_cont(" lost-heartbeat");
1249 pr_cont("\n");
1250#endif
1251
1252 if (tx_was_aborted)
1253 ei_tx_intr(dev);
1254 else
1255 {
1256 dev->stats.tx_errors++;
1257 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1258 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1259 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1260 }
1261}
1262
1263/**
1264 * ei_tx_intr - transmit interrupt handler
1265 * @dev: network device for which tx intr is handled
1266 *
1267 * We have finished a transmit: check for errors and then trigger the next
1268 * packet to be sent. Called with lock held.
1269 */
1270
1271static void ei_tx_intr(struct net_device *dev)
1272{
1273 long e8390_base = dev->base_addr;
1274 struct ei_device *ei_local = netdev_priv(dev);
1275 int status = inb(e8390_base + EN0_TSR);
1276
1277 /*
1278 * There are two Tx buffers, see which one finished, and trigger
1279 * the send of another one if it exists.
1280 */
1281 ei_local->txqueue--;
1282
1283 if (ei_local->tx1 < 0)
1284 {
1285 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1286 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1287 ei_local->name, ei_local->lasttx,
1288 ei_local->tx1);
1289 ei_local->tx1 = 0;
1290 if (ei_local->tx2 > 0)
1291 {
1292 ei_local->txing = 1;
1293 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1294 dev->trans_start = jiffies;
1295 ei_local->tx2 = -1,
1296 ei_local->lasttx = 2;
1297 }
1298 else ei_local->lasttx = 20, ei_local->txing = 0;
1299 }
1300 else if (ei_local->tx2 < 0)
1301 {
1302 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1303 netdev_info(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1304 ei_local->name, ei_local->lasttx,
1305 ei_local->tx2);
1306 ei_local->tx2 = 0;
1307 if (ei_local->tx1 > 0)
1308 {
1309 ei_local->txing = 1;
1310 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1311 dev->trans_start = jiffies;
1312 ei_local->tx1 = -1;
1313 ei_local->lasttx = 1;
1314 }
1315 else
1316 ei_local->lasttx = 10, ei_local->txing = 0;
1317 }
1318// else
1319// netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1320// ei_local->lasttx);
1321
1322 /* Minimize Tx latency: update the statistics after we restart TXing. */
1323 if (status & ENTSR_COL)
1324 dev->stats.collisions++;
1325 if (status & ENTSR_PTX)
1326 dev->stats.tx_packets++;
1327 else
1328 {
1329 dev->stats.tx_errors++;
1330 if (status & ENTSR_ABT)
1331 {
1332 dev->stats.tx_aborted_errors++;
1333 dev->stats.collisions += 16;
1334 }
1335 if (status & ENTSR_CRS)
1336 dev->stats.tx_carrier_errors++;
1337 if (status & ENTSR_FU)
1338 dev->stats.tx_fifo_errors++;
1339 if (status & ENTSR_CDH)
1340 dev->stats.tx_heartbeat_errors++;
1341 if (status & ENTSR_OWC)
1342 dev->stats.tx_window_errors++;
1343 }
1344 netif_wake_queue(dev);
1345}
1346
1347/**
1348 * ei_receive - receive some packets
1349 * @dev: network device with which receive will be run
1350 *
1351 * We have a good packet(s), get it/them out of the buffers.
1352 * Called with lock held.
1353 */
1354
1355static void ei_receive(struct net_device *dev)
1356{
1357 long e8390_base = dev->base_addr;
1358 struct ei_device *ei_local = netdev_priv(dev);
1359 unsigned char rxing_page, this_frame, next_frame;
1360 unsigned short current_offset;
1361 int rx_pkt_count = 0;
1362 struct e8390_pkt_hdr rx_frame;
1363
1364 while (++rx_pkt_count < 10)
1365 {
1366 int pkt_len, pkt_stat;
1367
1368 /* Get the rx page (incoming packet pointer). */
1369 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1370
1371 /* Remove one frame from the ring. Boundary is always a page behind. */
1372 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1373 if (this_frame >= ei_local->stop_page)
1374 this_frame = ei_local->rx_start_page;
1375
1376 /* Someday we'll omit the previous, iff we never get this message.
1377 (There is at least one clone claimed to have a problem.)
1378
1379 Keep quiet if it looks like a card removal. One problem here
1380 is that some clones crash in roughly the same way.
1381 */
1382 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
1383 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1384 this_frame, ei_local->current_page);
1385
1386 if (this_frame == rxing_page) /* Read all the frames? */
1387 break; /* Done for now */
1388
1389 current_offset = this_frame << 8;
1390 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1391
1392 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1393 pkt_stat = rx_frame.status;
1394
1395 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1396
1397 if (pkt_len < 60 || pkt_len > 1518)
1398 {
1399 if (ei_debug)
1400 netdev_printk(KERN_DEBUG, dev,
1401 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1402 rx_frame.count, rx_frame.status,
1403 rx_frame.next);
1404 dev->stats.rx_errors++;
1405 dev->stats.rx_length_errors++;
1406 }
1407 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1408 {
1409 struct sk_buff *skb;
1410
1411 skb = dev_alloc_skb(pkt_len+2);
1412 if (skb == NULL)
1413 {
1414 if (ei_debug > 1)
1415 netdev_printk(KERN_DEBUG, dev,
1416 "Couldn't allocate a sk_buff of size %d\n",
1417 pkt_len);
1418 dev->stats.rx_dropped++;
1419 break;
1420 }
1421 else
1422 {
1423 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1424 skb_put(skb, pkt_len); /* Make room */
1425 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1426 skb->protocol=eth_type_trans(skb,dev);
1427 netif_rx(skb);
1428 dev->stats.rx_packets++;
1429 dev->stats.rx_bytes += pkt_len;
1430 if (pkt_stat & ENRSR_PHY)
1431 dev->stats.multicast++;
1432 }
1433 }
1434 else
1435 {
1436 if (ei_debug)
1437 netdev_printk(KERN_DEBUG, dev,
1438 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1439 rx_frame.status, rx_frame.next,
1440 rx_frame.count);
1441 dev->stats.rx_errors++;
1442 /* NB: The NIC counts CRC, frame and missed errors. */
1443 if (pkt_stat & ENRSR_FO)
1444 dev->stats.rx_fifo_errors++;
1445 }
1446 next_frame = rx_frame.next;
1447
1448 /* This _should_ never happen: it's here for avoiding bad clones. */
1449 if (next_frame >= ei_local->stop_page) {
1450 netdev_info(dev, "next frame inconsistency, %#2x\n",
1451 next_frame);
1452 next_frame = ei_local->rx_start_page;
1453 }
1454 ei_local->current_page = next_frame;
1455 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1456 }
1457}
1458
1459/**
1460 * ei_rx_overrun - handle receiver overrun
1461 * @dev: network device which threw exception
1462 *
1463 * We have a receiver overrun: we have to kick the 8390 to get it started
1464 * again. Problem is that you have to kick it exactly as NS prescribes in
1465 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1466 * This includes causing "the NIC to defer indefinitely when it is stopped
1467 * on a busy network." Ugh.
1468 * Called with lock held. Don't call this with the interrupts off or your
1469 * computer will hate you - it takes 10ms or so.
1470 */
1471
1472static void ei_rx_overrun(struct net_device *dev)
1473{
1474 axnet_dev_t *info = PRIV(dev);
1475 long e8390_base = dev->base_addr;
1476 unsigned char was_txing, must_resend = 0;
1477
1478 /*
1479 * Record whether a Tx was in progress and then issue the
1480 * stop command.
1481 */
1482 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1483 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1484
1485 if (ei_debug > 1)
1486 netdev_printk(KERN_DEBUG, dev, "Receiver overrun\n");
1487 dev->stats.rx_over_errors++;
1488
1489 /*
1490 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1491 * We wait at least 2ms.
1492 */
1493
1494 mdelay(2);
1495
1496 /*
1497 * Reset RBCR[01] back to zero as per magic incantation.
1498 */
1499 outb_p(0x00, e8390_base+EN0_RCNTLO);
1500 outb_p(0x00, e8390_base+EN0_RCNTHI);
1501
1502 /*
1503 * See if any Tx was interrupted or not. According to NS, this
1504 * step is vital, and skipping it will cause no end of havoc.
1505 */
1506
1507 if (was_txing)
1508 {
1509 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1510 if (!tx_completed)
1511 must_resend = 1;
1512 }
1513
1514 /*
1515 * Have to enter loopback mode and then restart the NIC before
1516 * you are allowed to slurp packets up off the ring.
1517 */
1518 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1519 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1520
1521 /*
1522 * Clear the Rx ring of all the debris, and ack the interrupt.
1523 */
1524 ei_receive(dev);
1525
1526 /*
1527 * Leave loopback mode, and resend any packet that got stopped.
1528 */
1529 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1530 if (must_resend)
1531 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1532}
1533
1534/*
1535 * Collect the stats. This is called unlocked and from several contexts.
1536 */
1537
1538static struct net_device_stats *get_stats(struct net_device *dev)
1539{
1540 long ioaddr = dev->base_addr;
1541 struct ei_device *ei_local = netdev_priv(dev);
1542 unsigned long flags;
1543
1544 /* If the card is stopped, just return the present stats. */
1545 if (!netif_running(dev))
1546 return &dev->stats;
1547
1548 spin_lock_irqsave(&ei_local->page_lock,flags);
1549 /* Read the counter registers, assuming we are in page 0. */
1550 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1551 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1552 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1553 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1554
1555 return &dev->stats;
1556}
1557
1558/*
1559 * Form the 64 bit 8390 multicast table from the linked list of addresses
1560 * associated with this dev structure.
1561 */
1562
1563static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1564{
1565 struct netdev_hw_addr *ha;
1566 u32 crc;
1567
1568 netdev_for_each_mc_addr(ha, dev) {
1569 crc = ether_crc(ETH_ALEN, ha->addr);
1570 /*
1571 * The 8390 uses the 6 most significant bits of the
1572 * CRC to index the multicast table.
1573 */
1574 bits[crc>>29] |= (1<<((crc>>26)&7));
1575 }
1576}
1577
1578/**
1579 * do_set_multicast_list - set/clear multicast filter
1580 * @dev: net device for which multicast filter is adjusted
1581 *
1582 * Set or clear the multicast filter for this adaptor.
1583 * Must be called with lock held.
1584 */
1585
1586static void do_set_multicast_list(struct net_device *dev)
1587{
1588 long e8390_base = dev->base_addr;
1589 int i;
1590 struct ei_device *ei_local = netdev_priv(dev);
1591
1592 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1593 memset(ei_local->mcfilter, 0, 8);
1594 if (!netdev_mc_empty(dev))
1595 make_mc_bits(ei_local->mcfilter, dev);
1596 } else {
1597 /* set to accept-all */
1598 memset(ei_local->mcfilter, 0xFF, 8);
1599 }
1600
1601 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1602 for(i = 0; i < 8; i++)
1603 {
1604 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1605 }
1606 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1607
1608 if(dev->flags&IFF_PROMISC)
1609 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1610 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1611 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1612 else
1613 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1614
1615 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1616}
1617
1618/*
1619 * Called without lock held. This is invoked from user context and may
1620 * be parallel to just about everything else. Its also fairly quick and
1621 * not called too often. Must protect against both bh and irq users
1622 */
1623
1624static void set_multicast_list(struct net_device *dev)
1625{
1626 unsigned long flags;
1627
1628 spin_lock_irqsave(&dev_lock(dev), flags);
1629 do_set_multicast_list(dev);
1630 spin_unlock_irqrestore(&dev_lock(dev), flags);
1631}
1632
1633/* This page of functions should be 8390 generic */
1634/* Follow National Semi's recommendations for initializing the "NIC". */
1635
1636/**
1637 * AX88190_init - initialize 8390 hardware
1638 * @dev: network device to initialize
1639 * @startp: boolean. non-zero value to initiate chip processing
1640 *
1641 * Must be called with lock held.
1642 */
1643
1644static void AX88190_init(struct net_device *dev, int startp)
1645{
1646 axnet_dev_t *info = PRIV(dev);
1647 long e8390_base = dev->base_addr;
1648 struct ei_device *ei_local = netdev_priv(dev);
1649 int i;
1650 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1651
1652 if(sizeof(struct e8390_pkt_hdr)!=4)
1653 panic("8390.c: header struct mispacked\n");
1654 /* Follow National Semi's recommendations for initing the DP83902. */
1655 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1656 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1657 /* Clear the remote byte count registers. */
1658 outb_p(0x00, e8390_base + EN0_RCNTLO);
1659 outb_p(0x00, e8390_base + EN0_RCNTHI);
1660 /* Set to monitor and loopback mode -- this is vital!. */
1661 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1662 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1663 /* Set the transmit page and receive ring. */
1664 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1665 ei_local->tx1 = ei_local->tx2 = 0;
1666 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1667 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1668 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1669 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1670 /* Clear the pending interrupts and mask. */
1671 outb_p(0xFF, e8390_base + EN0_ISR);
1672 outb_p(0x00, e8390_base + EN0_IMR);
1673
1674 /* Copy the station address into the DS8390 registers. */
1675
1676 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1677 for(i = 0; i < 6; i++)
1678 {
1679 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1680 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1681 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1682 }
1683
1684 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1685 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1686
1687 netif_start_queue(dev);
1688 ei_local->tx1 = ei_local->tx2 = 0;
1689 ei_local->txing = 0;
1690
1691 if (info->flags & IS_AX88790) /* select Internal PHY */
1692 outb(0x10, e8390_base + AXNET_GPIO);
1693
1694 if (startp)
1695 {
1696 outb_p(0xff, e8390_base + EN0_ISR);
1697 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1698 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1699 outb_p(E8390_TXCONFIG | info->duplex_flag,
1700 e8390_base + EN0_TXCR); /* xmit on. */
1701 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1702 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1703 do_set_multicast_list(dev); /* (re)load the mcast table */
1704 }
1705}
1706
1707/* Trigger a transmit start, assuming the length is valid.
1708 Always called with the page lock held */
1709
1710static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1711 int start_page)
1712{
1713 long e8390_base = dev->base_addr;
1714 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
1715
1716 if (inb_p(e8390_base) & E8390_TRANS)
1717 {
1718 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1719 return;
1720 }
1721 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1722 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1723 outb_p(start_page, e8390_base + EN0_TPSR);
1724 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1725}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-16 08:55:38 -0400